```html
<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Sentinel流量控制与熔断降级指南</title>
    <link href="https://cdn.staticfile.org/tailwindcss/2.2.19/tailwind.min.css" rel="stylesheet">
    <link href="https://cdn.staticfile.org/font-awesome/6.4.0/css/all.min.css" rel="stylesheet">
    <link href="https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;500;600;700&family=Noto+Sans+SC:wght@300;400;500;700&display=swap" rel="stylesheet">
    <script src="https://cdn.jsdelivr.net/npm/mermaid@latest/dist/mermaid.min.js"></script>
    <style>
        body {
            font-family: 'Noto Sans SC', Tahoma, Arial, Roboto, "Droid Sans", "Helvetica Neue", "Droid Sans Fallback", "Heiti SC", "Hiragino Sans GB", Simsun, sans-serif;
            color: #333;
            line-height: 1.6;
            background-color: #f8f9fa;
        }
        h1, h2, h3, h4, h5, h6 {
            font-family: 'Noto Serif SC', serif;
            font-weight: 600;
            color: #1a1a1a;
        }
        .hero {
            background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
            color: white;
        }
        .card {
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            border-radius: 0.5rem;
            overflow: hidden;
        }
        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        }
        .highlight {
            background-color: rgba(59, 130, 246, 0.1);
            border-left: 4px solid #3b82f6;
            padding: 1rem;
            border-radius: 0 0.5rem 0.5rem 0;
        }
        .feature-icon {
            font-size: 2.5rem;
            color: #3b82f6;
            margin-bottom: 1rem;
        }
        .visualization {
            background-color: white;
            border-radius: 0.5rem;
            padding: 2rem;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
        }
        .tab-content {
            display: none;
        }
        .tab-content.active {
            display: block;
            animation: fadeIn 0.5s ease;
        }
        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }
        .tab-button.active {
            border-bottom: 3px solid #3b82f6;
            color: #3b82f6;
            font-weight: 500;
        }
        .first-letter {
            font-size: 3rem;
            line-height: 1;
            float: left;
            margin-right: 0.5rem;
            margin-top: 0.25rem;
            color: #3b82f6;
            font-weight: 700;
        }
    </style>
</head>
<body class="antialiased">
    <!-- Hero Section -->
    <section class="hero py-20 px-4 md:px-0">
        <div class="container mx-auto max-w-5xl text-center">
            <div class="inline-block px-3 py-1 mb-4 text-xs font-semibold tracking-wider text-blue-100 bg-blue-900 rounded-full">
                <i class="fas fa-shield-alt mr-1"></i> 微服务稳定性保障
            </div>
            <h1 class="text-4xl md:text-5xl font-bold mb-4">Sentinel流量控制与熔断降级</h1>
            <p class="text-xl md:text-2xl text-blue-100 max-w-3xl mx-auto mb-8">
                阿里巴巴开源的分布式系统流量防卫兵，保障微服务在高并发场景下的稳定性
            </p>
            <div class="flex justify-center space-x-4">
                <a href="#introduction" class="px-6 py-3 bg-white text-blue-700 font-medium rounded-lg hover:bg-blue-50 transition duration-300">
                    <i class="fas fa-book mr-2"></i>了解更多
                </a>
                <a href="https://github.com/alibaba/Sentinel" target="_blank" class="px-6 py-3 bg